If you can't explain it to a six year old, you don't understand it yourself. — Albert Einstein

If you can't explain it to a six year old, you don't understand it yourself.

Author: Albert Einstein

Insight: We've all had that moment—you're confidently explaining something to someone, and halfway through you realize you've lost them completely. That's usually the moment we blame the listener for "not getting it," but Einstein's suggestion cuts the other way: maybe we're the ones who don't actually get it. We just got good at sounding like we do. The tricky part is that this doesn't just apply to physics or rocket science. It applies to why you're staying in a dead-end job, or why you think a relationship isn't working, or what you actually want from life. When you can't break it down into simple terms, it often means you're operating on borrowed reasoning—something you picked up from someone else or justified through complicated logic rather than genuine understanding. Real knowledge is digestible. It can travel from one mind to another without needing a translator. This has become even more relevant now, when we're drowning in jargon—from tech to wellness to finance. Someone explaining cryptocurrency or mental health concepts in impossibly complex language might just be disguising thin understanding under layers of terminology. The six-year-old test is brutally honest: either you truly know something, or you know how to sound authoritative about it. Those aren't the same thing at all.